Discord's Family Reunion

Celestia's plan to reform Discord had worked. But as he and his new pony bride began to settle into a quiet, peaceful life, a letter from a family member arrives. In 3 days the 1 being in all of Equestria that Discord fears will be coming for a visit. Discord is now forced to 'pony up' to his new friends, and share with them his origins, before his past finally catches up with him.